packaging: setup: fix defaults initializations on additional host

Fixed initialization of ohostedcons.VDSMEnv.VDSM_CPU
using setdefault instead of direct assignment.
Fixed initializatoin of variables set by remote answer file

Change-Id: I959ad89b10c4cf34902d353bc6778a598eed670a
Bug-Url: https://bugzilla.redhat.com/1013557
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>